How to Customize the approval Reminder Notifications?

We have enabled approval on Change Assignment transaction and also set reminders every 3 days to the approver. We want to add some custom text in the approval reminder notifications. We don't want to show these in the actual approval notification which are sent the first time the transaction is assigned.

I am aware of how to customize the approval notification but there is no template avaialble for reminder notifications. So it is possible to customize just the reminder notification with some text addition and if yes how to do it?